Tumbler lock



Aug. 20 1940.

J. c. BUSICHE 2,212,262

TUMBLER 'LOCK Filed April 13, 1938 FIGJ.

INVENTOR- JOHN C.BUSCHE v ATTORNE s Patented Aug 20, 1940 2,212,262

UNITED STATES PATENT OFFICE TUMBLER LOCK John O. Busche, Highland Park, Mich. Application April 13, 1938, Serial No. 201,794 1 Claim. (Cl. 70-364) The present invention relates to tumbler locks the piece 25 shown in Figure 4:, which consists of and more especially to the locking cylinders a disc 25a having a squared post 252) fixed axially therefor. thereto, the disc being provided with a slot 250. Among the objects of the invention is to sim- This member 25 with its squared post fits in 5 plify the construction of such devices. the end of member 12 with the post 2512 extended Another object is a device of this character through opening I21) and is rotated by the cage which provides safe locking without the use of H through the action of part Hc, this fitting in springs. slot 250.

Another object is a lock barrel or plug which The key 20 is, as shown, provided with a series permits the use of a greater number of tumblers of cams on each edge, those on one edge being 0 in a barrel of a given size and therefore a wider located opposite the spaces between cams on the variation in the tumbler combinations. other edge, there being as many cams and op- Still other objects and advantages will be apposite spaces as there are tumblers. And, each L parent from the following description and the actumbler slot Illa is only slightly longer than the 15 companying drawing in which width of the key at any part of its length. 15

Figure 1 is a central longitudinal section Further, the key end is so shaped as to fit 1 through the lock barrel in the plane of the key. snugly the slot Hg in cage H, and it is of course 'Figure 2 is a perspective view of the barrel obvious that-the cams may be of different heights with parts broken away. to agree with differing locations of tumbler 0 Figures 3 to 6 are perspective views of details slots lea. of the construction. When the parts are assembled as indicated, Figure '7 is a section on line 1-4 of Figure 1, insertion of the key 20 will of course align the and tumblers It within cage II and out of slots I211,

Figure 8 is a section on line 8-8 of Figure 1. permitting the cage to turn and with it rotate In the drawing, the lock is indicated as conmember 25, this rotation being limited in either sisting of a series of tumblers l0 slidably carried direction by the projection He striking pin it. in a cage H, which with the tumblers properly As the key is inserted and progresses to its aligned is rotatably enclosed in a slotted barrel destination, namely, its end point at which the i2 and this in turn is enclosed by the outer houskey ceases its forward motion, the tumblers are ing l5, the several parts being held together by actuated reciprocally until the key ceases its for- 30 v a pin or key It. ward motion, at which time each and every Of the several parts, the tumblers It may be tumbler has found its correct position, namely of channel form as shown (in which case the that of alignment which is constituted by the sides of the channel act as spacers) or if more tumblers having their ends in parallel lines, pertumblers are to be used, the channels may be mitting the cylinder to rotate and thus either 35 more shallow Or the tumblers may be flat. In lock or unlock the mechanism.

any case each will have a suitable slot ma to per- When the key is withdrawn, provided the cage mit the passage of a key 20 which cooperates H s in proper position, the tumblers It will be with the ends of the slots. projected into the slots i211: and lock the cage and The cage II is preferably produced from a disc thereby the post 2%. Some of the tumblers will 40 Ha with a U-shaped member lib fixed thereto of course be moved in one direction and some and having one of its legs 1 lo extending through in the other. the disc Ha provided with shoulders lid near Now having described the invention and the its end. At the end ofthe cage ll opposite disc preferred embodiment, it is to be understood that Hi 8 Su e y e 6 Will be provided and said invention is to be limited, not to the specific 45 t e disc W e Slotted centrally at if, this details herein set forth, but only by the scope of slot being shaped to fit and locate the end of key th lai hi h f ll 20 as shown in Figure 1. What I claim is:

The slotted barrel I2 is provided as shown with A lock barrel for tumbler locks comprising a diametrically located slot l2a into which the cylindrical housing open at one end and closed at 50 ends of tumblers l0 project to prevent rotation the other and having a key admitting opening at of the cage, and is also provided at its closed the closed end, a second cylindrical member havend with a central opening Hi) and with opening an open end and provided with a central ings He in its sides for the passage of pin I6. opening in its closed end telescoped into the hous- In addi ion to the p rts described, there is also ing with its closed end outermost, said second 55 member being also provided with diametrically located slots, a cage rotatable within said second member and carrying a plurality of slidable tumblers adapted to project into said slots to prevent cage rotation, a tongue projecting from one end of said cage, bolt operating means projecting from the opening in the ends of said second member and actuable by the projecting tongue of said cage, each of said tumblers being slotted for the reception of a key whereby said tumblers may be properly aligned and withdrawn from the diametrical slots and said cage rotated, and means for fixing together the housing and second member, said fixing means also serving to limit cage rotation.

JOHN C. BUSCHE. 

